Home / 78,088.08-107,761.80-42,278.48

Finding the Fourth Proportional to 78,088.08, 107,761.80 and 42,278.48

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Solution

The fourth proportional to 78,088.08, 107,761.80 and 42,278.48 is: 58,344.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,088.08 : 107,761.80 = 42,278.48 : x
  2. Step 2: Convert to fraction form
    78,088.08/107,761.80 = 42,278.48/x
  3. Step 3: Cross multiply
    78,088.08x = 107,761.80 × 42,278.48
  4. Step 4: Simplify right side
    78,088.08x = 4,556,005,106.06
  5. Step 5: Solve for x
    x = 4,556,005,106.06/78,088.08
  6. Step 6: Final answer
    x = 58,344.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.